Darutigenol
Darutigenol has obvious antithrombotic effect,its mechanism may be related to inhibition of platelet aggregation and adhesion.
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to
24 months(2-8C).
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
Need more advice on solubility, usage and handling? Please email to: service@chemfaces.com
The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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Talanta. 2012 Jan 30;89:505-12.
Molecularly imprinted polymer for the specific solid-phase extraction of kirenol from Siegesbeckia pubescens herbal extract.[Pubmed:
22284524]
Molecular imprinted polymers (MIPs) were prepared by thermal polymerization using a non-covalent molecularly imprinting strategy with kirenol as the template, acrylamide (AM) as the functional monomer and ethylene glycol dimethacrylamide (EGDMA) as the cross-linker in the porogen of tetrahydrofuran (THF).
METHODS AND RESULTS:
The synthesized MIPs were characterized by scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR). Its molecular recognition property was investigated by UV spectrogram. High-pressure liquid chromatography (HPLC) was used for analysis of target analytes. The polymers were evaluated further by batch rebinding experiments, and from the derived isotherms their binding capacity and binding strength were determined. Then the selectivity of the MIPs was checked toward the selected structurally related compounds and the recognition coefficients for kirenol, Darutigenol, and ent-2-oxo-15, 16, 19-trihydroxypimar-8(14)-ene (TD) were 2.47, 3.43 and 3.40, respectively. The properties of MIPs for SPE were also evaluated.
CONCLUSIONS:
The results obtained demonstrate that the good imprinting effect and the excellent selectivity of MIPs were obtained. The optimized molecular imprinted SPE procedure was applied to extract kirenol directly from the extracts of the aerial part of Siegesbeckia pubescens herb. A selective extraction of kirenol from traditional Chinese medicine (TCM) was achieved with extraction yield of 80.9%.
Zhongguo Zhong Yao Za Zhi. 2014 Aug;39(15):2907-11.
Study on index components and fingerprints of crude and processed Siegesbeckia Herbs.[Pubmed:
25423830]
The change of kirenol, Darutigenol and darutoside in Siegesbeckia and its first to ninth processed products were studied, and the ten fingerprints were compared, which provided the experimental basis for the study of Siegesbeckia processing tech- nology.
METHODS AND RESULTS:
The samples were analysed by HPLC on a SunFire-C18 column (4.6 mm x 150 mm, 5 μm) with gradient elution of acetonitrile (0.1% formic acid)-water (0.1% formic acid) at a flow rate of 1.0 mL x min(-1). Column temperaturewas 30 °C and the detected wavelength was 215, 320 nm. The calibration curves of kirenol, Darutigenol and darutoside were linear in the range of 2.180-26.16, 2.900-34.80, and 1.012-6.072 mg x L(-1), respectively, and the average recoveries were 96.4%, 97.2% and 96.3% wit RSD 2.2%, 1.7% and 2.4%. This method was simple, the result was stable and had good repeatability, recovery and precision.
CONCLUSIONS:
The result was the basis of the chemical contents variation in the processing of Siegesbeckia Herbs and further clarifying the effect of the changing.
